/
main.go
353 lines (330 loc) · 9.17 KB
/
main.go
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package main
import (
_ "embed"
"go/ast"
"go/parser"
"go/token"
"log"
"os"
"strings"
"text/template"
)
func main() {
var packageName string
args := Args{}
err := args.Parse()
if err != nil {
log.Panic(err)
}
for _, fileName := range args.Files {
types := scanAllTypes(fileName)
for _, t := range types {
generatedTypes[t] = true
}
}
for _, fileName := range args.Files {
packageName, err = generate(fileName, args)
if err != nil {
log.Panic(err)
}
}
err = createUtilsFile(packageName, args)
if err != nil {
log.Panic(err)
}
}
var sourceOfFile string //nolint:gochecknoglobals
func scanAllTypes(fileName string) []string {
fset := token.NewFileSet()
src, err := os.ReadFile(fileName)
if err != nil {
return []string{}
}
sourceOfFile = string(src)
// node, err := parser.ParseFile(fset, fileName, nil, parser.ParseComments)
node, err := parser.ParseFile(fset, "", src, 0)
if err != nil {
return []string{}
}
typesInFile := []string{}
for _, f := range node.Decls {
g, ok := f.(*ast.GenDecl)
if !ok {
continue
}
for _, spec := range g.Specs {
currSpecType, ok := spec.(*ast.TypeSpec)
if !ok {
continue
}
typesInFile = append(typesInFile, currSpecType.Name.Name)
}
}
return typesInFile
}
func generate(fileName string, args Args) (string, error) { //nolint:gocognit,maintidx
fset := token.NewFileSet()
var packageName string
src, err := os.ReadFile(fileName)
if err != nil {
return packageName, err
}
sourceOfFile = string(src)
// node, err := parser.ParseFile(fset, fileName, nil, parser.ParseComments)
node, err := parser.ParseFile(fset, "", src, 0)
if err != nil {
return packageName, err
}
generatedFileName := strings.TrimSuffix(fileName, ".go") + "_compare.go"
generatedFileNameTest := strings.TrimSuffix(fileName, ".go") + "_compare_test.go"
_ = os.Truncate(generatedFileName, 0)
file, err := os.OpenFile(generatedFileName, os.O_CREATE|os.O_WRONLY, 0o600)
if err != nil {
return packageName, err
}
defer file.Close()
_ = os.Truncate(generatedFileNameTest, 0)
fileTest, err := os.OpenFile(generatedFileNameTest, os.O_CREATE|os.O_WRONLY, 0o600)
if err != nil {
return packageName, err
}
defer fileTest.Close()
// Adding the header to the generated file
tmpl, err := template.New("generate.tmpl").Parse(tmplHeader)
// ParseFiles(path.Join(templatePath))
if err != nil {
return packageName, err
}
err = tmpl.Execute(file, map[string]interface{}{
"Package": node.Name.String(),
"Licence": args.Licence,
})
if err != nil {
return packageName, err
}
// Adding the header to the generated file
tmpl2, err := template.New("generate.tmpl").Parse(tmplHeader)
// ParseFiles(path.Join(templatePath))
if err != nil {
return packageName, err
}
err = tmpl2.Execute(fileTest, map[string]interface{}{
"Package": node.Name.String(),
"Licence": args.Licence,
})
if err != nil {
return packageName, err
}
packageName = node.Name.String()
imports := map[string]string{}
for _, imp := range node.Imports {
if imp.Name != nil {
imports[imp.Name.Name] = strings.Trim(imp.Path.Value, "\"")
} else {
s := strings.Split(imp.Path.Value, "/")
imports[strings.Trim(s[len(s)-1], "\"")] = strings.Trim(imp.Path.Value, "\"")
}
}
hasTests := false
// For each declaration in the node's declarations list, check if it is a generic declaration.
// If it is, get the type specification of each generic type.
for _, f := range node.Decls {
g, ok := f.(*ast.GenDecl)
if !ok {
continue
}
for _, spec := range g.Specs {
currSpecType, ok := spec.(*ast.TypeSpec)
if !ok {
continue
}
switch currType := currSpecType.Type.(type) {
case *ast.StructType:
var fields []Field
needsOptions := false
needsOptionsIndex := false
fields, needsOptions, needsOptionsIndex = getFields(fields, currType, imports)
for _, f := range fields {
if strings.HasPrefix(f.Type, "*") && (f.HasEqualOpt || f.HasEqual) {
needsOptions = true
break
}
}
hasTests = true
err = generateEqualAndDiff(generateEqualAndDiffOptions{
PackageName: packageName,
File: file,
FileTest: fileTest,
Name: currSpecType.Name.Name,
CurrType: currSpecType,
Fields: fields,
NeedsOptions: needsOptions,
NeedsOptionsIndex: needsOptionsIndex,
Mode: "struct",
})
if err != nil {
log.Panic(err)
}
case *ast.Ident:
hasTests = true
err = generateEqualAndDiff(generateEqualAndDiffOptions{
PackageName: packageName,
File: file,
FileTest: fileTest,
Name: currSpecType.Name.Name,
NeedsOptions: false,
Mode: "ident",
})
if err != nil {
log.Panic(err)
}
case *ast.ArrayType:
res := getTypeString(currType.Elt, imports)
// needsOptions := !res.IsBasicType
needsOptions := true
needsOptionsIndex := false
if res.Name == "Index" {
needsOptionsIndex = true
}
err = generateEqualAndDiff(generateEqualAndDiffOptions{
PackageName: packageName,
File: file,
FileTest: fileTest,
Name: currSpecType.Name.Name,
Type: res.Name,
CurrType: currSpecType,
IsBasicType: res.IsBasicType,
IsComplex: res.IsComplex,
IsComparable: false,
IsPointer: strings.HasPrefix(res.Name, "*"),
NeedsOptions: needsOptions,
NeedsOptionsIndex: needsOptionsIndex,
Mode: "array",
})
if err != nil {
log.Panic(err)
}
case *ast.MapType:
res := getTypeString(currType, imports)
// needsOptions := !res.IsBasicType
needsOptions := true
needsOptionsIndex := false
if res.Name == "Index" {
needsOptionsIndex = true
}
err = generateEqualAndDiff(generateEqualAndDiffOptions{
PackageName: packageName,
File: file,
FileTest: fileTest,
Name: currSpecType.Name.Name,
Type: res.Name,
CurrType: currSpecType,
IsBasicType: res.IsBasicType,
IsComplex: res.IsComplex,
IsComparable: false,
IsPointer: strings.HasPrefix(res.Name, "*"),
NeedsOptions: needsOptions,
NeedsOptionsIndex: needsOptionsIndex,
Mode: "map",
})
if err != nil {
log.Panic(err)
}
}
}
}
if hasTests {
err = fmtFile(generatedFileNameTest)
if err != nil {
return packageName, err
}
} else {
os.Remove(generatedFileNameTest)
}
// Format the file
err = fmtFile(generatedFileName)
if err != nil {
return packageName, err
}
return packageName, nil
}
func getFields(fields []Field, node *ast.StructType, imports map[string]string) (fieldsResult []Field, needsOptions, needsOptionsIndex bool) { //nolint:gocognit
for _, field := range node.Fields.List {
if len(field.Names) > 0 {
res := getTypeString(field.Type, imports)
if res.StructType != nil {
var structFields []Field
structFields, no, nOpt := getFields(structFields, res.StructType, imports)
needsOptions = needsOptions || no
needsOptionsIndex = needsOptionsIndex || nOpt
structName := field.Names[0].Name
for _, f := range structFields {
f.Name = structName + "." + f.Name
fields = append(fields, f)
}
continue
}
f := Field{
Name: field.Names[0].Name,
Type: res.Name,
TypeInFile: res.TypeName,
IsBasicType: res.IsBasicType,
IsComparable: res.IsComparable,
HasString: res.HasStringer,
HasEqual: res.HasEqual,
HasEqualOpt: res.HasEqualOpt,
IsArray: res.IsArray,
IsMap: res.IsMap,
MapKeyType: res.MapKeyType,
MapItemType: res.MapItemType,
}
if res.SubType != nil {
f.SubType = &Field{
Name: res.SubType.Name,
Type: res.SubType.Name,
TypeInFile: res.SubType.TypeName,
IsBasicType: res.SubType.IsBasicType,
IsComparable: res.SubType.IsComparable,
// IsEmbedded: res.SubType.IsEmbedded,
HasString: res.SubType.HasStringer,
HasEqual: res.SubType.HasEqual,
HasEqualOpt: res.SubType.HasEqualOpt,
IsArray: res.SubType.IsArray,
IsMap: res.SubType.IsMap,
// MapKeyType: res.MapKeyType,
// MapItemType: res.MapItemType,
}
}
fields = append(fields, f)
if field.Names[0].Name == "Index" {
needsOptionsIndex = true
}
if strings.HasPrefix(res.Name, "[]") {
needsOptions = true
}
if strings.HasPrefix(res.Name, "map") {
needsOptions = true
}
needsOptions = needsOptions || res.IsComplex
}
// For embedded struct
if len(field.Names) == 0 && field.Type != nil {
res := getTypeString(field.Type, imports)
fields = append(fields, Field{
Name: res.Name,
IsEmbedded: true,
IsComparable: res.IsComparable,
HasString: res.HasStringer,
HasEqual: res.HasEqual,
HasEqualOpt: res.HasEqualOpt,
// MapKeyType: res.MapKeyType,
// MapItemType: res.MapItemType,
})
if res.Name == "Index" {
needsOptionsIndex = true
}
needsOptions = true
}
}
return fields, needsOptions, needsOptionsIndex
}